Process of making drawing-pens.



F. 0. RACE.

PROCESS OF MAKING DRAWING PENS. APPLICATION FILED IAN-26.1918.

7 1,288,675. Patented Dec. 24, 1918.

use.

'stantially tint FRED 0. RAGE, OF NEWARK, NEW JERSEY.

PROCESS OF MAKING DRAWING-PENS.

Specification of Letters Patent.

rammed Dec. 2a, 1918.

Application filed January 26, 1918 Serial No. 213,990.

To all whom it may concern:

Be it known that I, FRED 0. RACE, a citizen of the United States, and aresident of Newark, county of Essex, and State of New Jersey, haveinvented certain new and useful lmprovements in Processes of MakingDrawing-Pens, of which the following is aspecification.

My invention relates to an improved process for making drawing pens fordraftsmens A superior article of the character referred to may beproduced in accordance with my process at a'very great saving inexpense. In order that a drawing pen may be capable of holding aconsiderable reserve supply of ink without danger of dropping, and beadjustable for making lines of considerable width without dropping orblotting, it is requisite that the. interior surfaces of theseparatednibs between which the ink is held shall be very smooth and highlypolished, and this is very difficult if not impossible of attainmentwhen, as is customarily the practice, the pen is constructed of a singlepiece of material, and the opening between the nibs is formed by cuttingout the material between the nibs by a milling machine or similardevice, since in such case the access to the interior surfaces islimited and difficult and the requisite degree of smoothness and polish,if attainable at all, can only be secured with the utmost difficulty andat con siderable expense.

According to the present invention the nibs of the pen are formedseparately and are afterward secured together in such manner that astructure is obtained which is subas strong and rugged as if made from asingle piece of metal. The nibs being constructed separately may beproduced in a simple and effective manner, as by means of dies, andaccess is, of course, obtained to the interior surfaces of the nibswhich may readily and cheaply be made entirely smooth and be given ahigh polish.

In the drawing forming part of this specification and wherein the samereference numerals designate the same parts throughout, I haveillustrated a pen made in accordance with my improved process,indicating the steps of the process by which it is produced.

In the said drawing which is intended only for the purpose of making myinvention clearly understood and not for limitation thereof, Figure 1 isa side view of a completed pen. Figs. 2 and 3 are side views of the pennibs, the dies by which they are formed being illustrated in dottedlines. Figs. 4 and 5 are plan views of the pen nib parts with the diesalso illustrated in dotted lines. Figs. 6 and 7 are end views of the nibparts. Fig. 8 is a view partly in dotted lines illustrating thepreferred mode. of shaping the shank and shoulder of the pen. Fig. 9 isa similar view illustrating the mode of attaching the holding sleeve forsecuring the pen nibs together, and Fig. 10 is a side view of the 'penwithout the handle but with the holding sleeve in place thereon and withthe openings formed therein for the adjusting screw.

The two pen nibs are designated by refer ence numerals 10 and 11 and arepreferably formed of steel, dies 12 and 13 being used to form the nib l0and being provided with appropriate forming surfaces for this purpose,and dies 1a and 15 of appropriate form being used to make the nib 11.The nib 10 is formed with a substantially half cylindri cal lug l6 andthe nib 11 with a similar sub stantially half cylindrical lug 17, thetwo when placed together forming a substantially cylindrical shank 18 asshown in Figs. 8 and 9. After the nibs are formed by dies, as stated,their inner surfaces 19 and 20, as well as their other surfaces, are ofa high degree of smoothness and the interior surfaces 19 and 20 arepreferably buffed in or der to give them a high polish before the partsare assembled together. If desired, these inner surfaces 19 and 20 maybe ground after being die formed and before being buffed, but as a rulethis is not necessary and it is not considered essential. The pen pointsmay be also ground to a true fit, if desired. After the nibs 10 and 11have been completed they are placed together in pairs, preferably in aclamp as illustrated at 21, Fig. 8, and the shank 18 and the shoulder 22are trued up as by means of a hollow member 23 which simultaneouslytrues up the shank and forms the accurate shoulder 22, and while thenibs are still held together in the clamp 21, the holding sleeve 24 isforced thereon as by driving means 25, such as a hammer or press punch,the opening 26 in the sleeve 24 being of such dimension that the sleeve2 f has a driving fit on the shank 18, and when driven completely inplace thereon, as in Fig. 10, serves to hold the nibs 10 and 11 securelytogether with substantially as great rigidity as if the parts were allmade of a single piece of metal. After the nibs 10 and 11 have beensecured together bv the sleeve 2% and their permanent relation to oneanother established, the nibs are bored for the adjusting screw 30, athreaded opening 31 being made in the nib 10 and a preferably smoothsomewhat larger opening in the nib 11, the nib 11 being preferablythinned as shown at 33 in order to give it a spring action so that thenibs may be adjusted relatively by the screw to provide the desireddistance between the points of the nibs whereby the width of the line tobe formed by the pen is regulated.

Suitable provision is made for attaching the handle 27 t0 the sleeve 24,and in the form shown the handle 27 is provided with a threaded shank 28which is screwed Within the threaded opening 29 provided in the sleeve24 to receive the same.

It will be seen that by the present invention a drawing pen may beconstructed at very low cost and that access to every part thereof isreadily had in the manufacture, and all parts may be made smooth andaccurate and may be readily given a high degree of finish or polish.

I claim:

1. The process of making a drawing pen which comprises forming separatenibs therefor by means of dies, clamping the nibs together and forming asubstantially cylindrical shank thereon made up in part of the materialof each nib, and securing a sleeve upon said shank with a driving fitwhile the nibs are still clamped together.

2. The process of making a drawing pen which includes forming the nibs"therefor separately by means of dies, polishing the freely exposedinterior portions of the nibs, clamping the nibs together in permanentrelation and forming a substantially cylindrical shank, part on eachnib, driving a sleeve on such shank while clamped, and boring andtapping the shanks for the adjustment screw after they have been securedtogether by means of the sleeve.

In testimony that I claim the foregoing, I hereto set my hand, this 23rdday of January, 1918.

0. RACE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. 0.

